Motor horn



W. KAISLNG MOTOR HORN Filed May El, 1918 2 Sheets-Sheet l MEZZI/f' 5252152257.. EU

w. KAlsLlNG MOTOR HORN Oct. 14 1924. 1,511,345

Filed May 51, A1918` 2 snaps-sneer 2 Patented Oct. 14, 1924.

UNITEDSTATES yPari-:NT OFFICE.

WILLIAM KAISLING, OF CHICAGO, ILLINOIS, ASSIGNOR TO' KELLOGG SWITCHBOARD i AND SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

MOTOR HORN.

Application ma my s1, 191s. serial no. 237,512.

To all whom z't may concern.

Be it known that I, WILLIAM KAIsLING, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Motor Horns, of which the following is a specification.

My invention is particularl directed to electrically operatedsignaling llorns includin'g a vibratile member, such as a diaphragm, a small rotary motor and an enclosing casing provided with a resonator or horn. The

small rotary motor is located directly behind the diaphragm, and its shaft is provided with a cam mounted upon it and arranged in operative relation with an impact device or anvil mounted upon the rear face of the diaphragm. The motor is small and compact in construction and consumes but little current and may be operated from a low voltage storage battery which is now almost universally used in conjunction with the ignition systemof an automobile engine.

A feature of my invention is the provision of means for-.micrometrically adjusting the rotary motor relative to the anvil or contact device which the serrated portion of the armature, or agitator, contacts with. Two of the laminations of the field piece of the motor are provided with projectmg ears that are formed into circular tubes through which a pair of threaded studs pass. Nuts are provided for the threaded studs for moving the motor as a unit away from or towards the diaphragm and anvil thereby regulating the contact of the agitator with the anvil of the diaphra'gm.

Another feature of my invention is the construction of the armature of the motor, the said armature being of laminated construction and havin' part of its laminations serrated or provided with teeth which form the'cam for engaging the contact deviceor anvil mounted upon the diaphragm. The portion of the armature that is provided with serrations or teeth forms limpart of the armature through which the ux traverses whenpassing from one pole piece to the other pole piece of the eld of the motor. By constructing the cam of the motor as part of the armature of the motor, I am able to provide a wider armature and field piece for the same sized motor than I otherwise would be able to provide if it were necessary to extend the cam of the motor past or at the outside of the field piece of the motor. By this arrangement, I am also able to mount the motor concentrically with respect to the diaphragm. The successive engagement of the anvil by the teeth of the cam causes the diaphragm to vibrate to emit a sound through the resonator.

The features above outlined, as well as others, will be more fully pointed out in the ensuing specification and in the appended claims.

For a more complete understanding of my invention, reference may be had to the accompanying drawings in which like reference characters denote vlike parts, and in which: Fig. l is a rear elevation of the signaling horn embodying my invention shown with the rear cap or cover removed;

Fig. 2 is a left side elevation of Fig. 1 with certain parts shown in section;

Fig. 3 is a sectional view taken along line 3 3 of Fig. 2.

Fig. 4 is a sectional view taken along the line 4 4 of Fig. 2, and

Fig. 5 is a sectional view along the line 5 5 of Fig. 1.

Referring now more in detail to the device as illustrated, it comprises a resonating or reverberatin'g horn 1 (only a part of which is shown) suitably secured to the front plate 2 in any suitable manner, as by means of rivets 3. A mounting frame 4 is provided to which the apparatus as a whole is secured,

as will be more fully hereinafter described. A diaphragm 5 of suitable material is placed within the cup-shaped portion 2 of the front plate 2 with a packing ring 6 of any suitable material such as cork between it and the front plate 2. A packing ring 7 is then placed between the diaphragm 5 and the mounting frame 4. The front plate 2, diaphragm 5, packing rings 6 and 7, and mounting frame 4 are then securely clamped together by ymeans of bolts 8, thus circumferentially engaging and clamping the diafield piece of the motor, but the terminal clip 112 is insulated from the field of the motor by means of pieces of ber 113 and 114. The laminations 10 and 102 of the U-shaped fieldY piece are provided with integrally formed extended portions 103 and 10", respectively by which the U-shaped field piece F is adjustably secured to the threaded studs 13 and 14. The extended portions 103 and 104 ofthe laminations 10 and 102 extend from each side of the field piece F and are so formed as to provide a cylindrical tube at each side of the field piece F through which the posts 13 and 14 extend.

The posts 13 and 14 are each provided with a shoulder, 13` and 14', respectively, and also with a reduced portion, 132 and 142, respectively, which reduced portions extend through orifices 133 and 143 in the plate 4. The reduced portions of the posts 13and 14 are then riveted over to secure said posts to the frame 4. The post 14 is provided with a pair of nuts 15 and with Washers 16. Likewise, the post 13 is provided with a pair of nuts 17 and washers 18. To micrometrically adjust the motor as a unit relative to the an'-` vil onthe diaphragm', it is only necessary to loosen the nuts 17 and 15 and to then turn them to the right or left, depending upon whether it is desired to move the motor away from ortowards the diaphragm. The rear nuts are then tightened to securely hold the motor in adjusted position. A. field coil 21;' is. suitably wound upon the U-shapedl field-2 plece F and the terminals of the windin are are secured to the field piece F by means of ,the rivets 11. The terminal 112 has a ri ht angle extension 22 which is provided Wit a U-shaped clamping member 23, held in place by means of a screw 24, which has screwthreaded engagement with .the said extension 22 and serves as a binding post'or one of the leads that connects to the circuit closer or battery. The terminal 11 which is conductively secured to the field piece by means of bolts 11 is electrically connected to the other brush of the motor.

A laminated armature AR for the motor is centrally positioned between the pole pieces of the U-shaped field piece F, the said armature being built u of a lurality of disks 30 which are fitte upon t e shaft 31 in any suitable manner, as by means of a drive fit., The laminations are held together by means of rivets. The armature has a plurality of circular slotted orifices 34 extending lengthwise of the armature. The windings 36 o f the armature arecontained in these orifices and the terminals of these windings are led to the `terminals of the commutator CO. The ends of the armature are flush with the outside laminations of the field piece F, that is, the armature'is substantially of the same width as the field piece F. Four or five laminations. of the armature comprising the laminations nearest the commutator CO serve the purpose of a cam, said laminations being provided with a plurality of teeth 37 which engage the anvil 38 mounted upon the diaphragm 5 when the armature is rotated. v

The anvil 38 is formed out of a circular disk and hasa V-shaped portion pressed out and hardened for engagement with the'teeth of the cam; The anvil 38 is suitably fastened to the center of the diaphragm by means of rivets 40. The commutator CO issuitably mounted upon the shaft-31 by. Ameans of a drive fit, and it comprises a core of insulating material having its periphery provided with a plurality of ridges or ribs 42 which form separators for the segments 43 of the commutator CO. .The segments 43 are s shaped to conform with the periphery of the lcore and are of a width to" fit between the ribs 42. The segments 43 are provided with terminal clips 43', referably. formed integrally therewith and) of the armature are attached. The segments 43 are secured to the core by means of -f clamps 43 which are'turned over the edge vfof the core. I rotatably support the motor shaft' 31 and its partsas a whole in bearings 645' and 46 which are located in the bridge yplates 47 and 48, the said bridge plates being suitably secured to the field piece F by means of screws. The bearin s that rotatably suport the shaft`31 are of the well known ball earing type, comprising the. usual ball race or cup 51, lcone52and ball bearings. The end 54 of the shaft 31 has a groove (not shown), into which a split collar is placed,

saidv collarfitting in a suitable countersunk portion in the cone of the bearing 45.

The other end of the shaft is threaded, and

provided with `a pair of nuts 59 vfor holding vthe-'shaft and motor in osition.

The motor 'brush ho ders 62 and 63. are suitably-supported in the bridge plate 48. Each brush com rises a shell fitting into an opening in the ridge plate but insulated therefrompb means of washers of insulating materia 64. The brush shell is provided with a hexagonal shoulder 65 which to which the windingsI mature, said cy l cluding a diaphra restsagainst one of the washers 64 and the other end of the brush shell is threaded to receive a hexagonal nut 66 which turns up against the other washer 64, thereby securel holding the brush shell'in position. Thread): ed onto ,the threaded extremity of the brush shell 62 is a knurled cap 67 which is provided withfan opening through which the cord 68 which extends to the terminal 11 passes. The brush 68 is made of any suitable material, as copper wire gauze, rolled to form a brush of a size to fit into the orifice that extends into the shell 62.` Thelead which connects the brush to the terminal 11 is soldered to the wire gauze brush. A coiled spring (not shown) Aretains the brush firmly against the commutator, one end of the coiled spring resting against the cap 67 and the other end agalnst the brush. To remove the brush, it is only n ma ry to unscrew the knurled cap 67 and to ull out the coiled spring and the brush. el brush 63 is similar in all respects to the brush 62.' A suitable enclosing casin 71 is provid which fits over the flanged rtion 41 of the frame 4v and is suitably he d in position by means of screws not shown). In assembling th'e horn an attuning it, the nuts 17 and 15 are adjusted as previously described lto permit the entire motor to be moved alon the p'osts 13 and 14 toward or from the diap ragm.

While the invention has been described with particular reference to the details of construction, it should be understood that it is not limited thereto as man changes and modifications may be made tllerein without departing therefrom, and I therefore, wish to cover all, such changes and modifications which come within the spirit and scope of the appendedclaims.

What I claim as new and desire to secure byUnited States Letters Patent is:

11-A devce olf the character described inc u mg a rap ragm, a rota vided with a field piecehavriyng two pole pieces, a cylindrical armature for said motor, teeth for said amature for actuating said diaphragm, the circumference of the part of the armature containing the said teeth being the same as the circumference of the remainin part of the cylindrical ar'- lindrical armature andteeth being situated in a position to connect the pole pieces of said field piece by the shortest magnetic path.

2. A device of the character described ina rotary motor provided with a tiel piece having two pole pieces, a cylindrical armature for said motor, teeth for said armature for actuating said diaphragm, the circumference of the part of the armature containingl the teeth being no greater than the circumference of the remaining part of the armature, said motor procylindrical armature and teeth being situated 1n a position to connect the pole piece of saidy field piece by the shortestmagnetic path.

3. Asignalling device, including a motor, a laminated field piece therefor, part of the laminations being extendedjin opposite directions and provided with openings, a mounting member forsaid motor, threaded studs carried by the mounting member and engaged with said openings for adjustably securing the motor to said mounting memed, plece having its poles arran ed to receive said armature, certain of the aminations of the armature, to one side of its longitudinal center bein formed to .produce wear piece engaging e ements, said engaging elements being encompassed within said poles, a mounting device, and means `for supporting the motor with the engaging elements in contact with the wear piece.

6; In a signalling device, havin a wear piece, a motor including a shaft aving a serrated member,cooperating with the wear piece towibrate the diaphragm, a field piece provided with oppo a .diaphragmmounting plate, parallel members carried thereb and engaged in aid o enin of the field piece for permitting bodily a justment of the motor toward and away from the diaphragm.

7. Amotor horn-comprising a diaphragm carrying a wear piece, a motor including a shaft having .a serrated cam for cooperating with said wear iece and a field piece provided with opposltely disposed openings, a mounting plate, studs carrled thereby and projecting through said openings, and means on said studs for adjusting the motor b0dily toward and away from the diaphragm.

8. A signaling device of the character described including a mounting member, a rotary motor provided with a laminated field piece, part of the laminationsv of said field piece being extended and formed into cylindrical tu screw-threaded members secured to said mounting member and passing throu h said tubes, and nuts ada ted to be threaded onto said screw threade members for adjustably securing said motor to said mountin member.

9. A signaling device of the character described including a mounting member, a

sltely extended laminae having openings, a.

diaphragm attached to said mounting member, a rotary motor provided with means for Vibrating said diaphragm, a laminated field piece for said rotary motor, part ofthe lami- 5 nations of the eld piece being extended and formed into cylindrical tubes, studs secured to said mounting member and extending through said cylindrical tubes, and means miriam -WILLIAM KAISLING. 

